The Dodecanese (/doʊdɪkəˈniːz/; Greek: Δωδεκάνησα, Dodekánisa, [ðoðeˈkanisa]; literally 'twelve islands') are a group of 12 larger plus 150 smaller Greek islands in theAegean Sea, of which 26 are inhabited. Τhis island group generally defines the eastern limit of the Sea of Crete. They belong to the Southern Sporades island group. They have a rich history, and many of even the smallest inhabited islands boast dozens ofByzantine churches and medieval castles.
The most historically important and well-known is Rhodes (Rodos), which, for millennia, has been the island from which the region is controlled. Of the others, Kos and Patmosare historically more important; the remaining nine are Astipalea, Kalimnos, Karpathos,Kasos, Leros, Nisyros, Symi, Tilos and Kastelorizo (which actually lies in the eastern Mediterranean). Other islands in the chain include Agathonisi, Alimia, Arkoi, Chalki, Farmakonisi, Gyali, Kinaros, Levitha, Lipsi, Nimos, Pserimos, Saria, Syrna and Telendos.